I'm running Plone 5.2.1 on Python 3.7.2 and working on theming my website. I have tried using both the Minimal Buildout and the Unified Installer. Once the site is launched to localhost, when I access the theming control panel and press the picture icon to preview or modify the theme and press the 'preview theme button' I receive the below stack trace. This occurs with the default Barceloneta theme as well as a theme that I import via a zip file.
Any information anyone can provide would be greatly appreciated!
Traceback (innermost last):
Module ZPublisher.WSGIPublisher, line 156, in transaction_pubevents
Module ZPublisher.WSGIPublisher, line 338, in publish_module
Module ZPublisher.WSGIPublisher, line 256, in publish
Module ZPublisher.mapply, line 85, in mapply
Module ZPublisher.WSGIPublisher, line 62, in call_object
Module plone.app.theming.browser.mapper, line 269, in getFrame
Module plone.app.theming.utils, line 193, in findContext
AttributeError: 'RequestContainer' object has no attribute 'PARENTS'
- Plone 5.2.1 (5208)
- CMF 2.4.2
- Zope 4.1.3
- Python 3.7.2 (default, Mar 24 2020, 13:50:54) [GCC 4.8.5 20150623 (Red Hat 4.8.5-39)]
- PIL 6.2.1 (Pillow)
- WSGI: On
- Server: waitress 1.4.3